NGA-2000 System Calibration

4.2.2 Before starting actions

Before any action of sequence buffer is done there are some preparations to do:

∙store previous calibration time for the case of cancelling

∙previous calibration time is now the actual one

∙actual calibration time is reset

∙cancel any running calibration of an AM

4.2.3 Control of actions

4.2.3.1 Switch valves

The SWITCH_VALVE action just takes the action data[0] (valve mask) for the new setting of system valves.

We have just to modify LON-variable STCONT3, STCONT4 and partially STCONT5 , which are linked to system valves.

This action also resets time (takes system tick) for delay measurement of purge times.

4.2.3.2 Wait for Purging

The PURGEWAIT-action looks for the present time went over since last SWITCH_VALVE- action.

For the still required difference up to the needed purge time is now waited. It gives time to other tasks. If there is no additional time to wait it is continued directly with next action.

Supplement - 28

NGA 2000

90003482(2) [NGA-e (MLT-Software 3.2.X)] 07/98